Polder I in the Salzderhelden flood retention basin

	Polder I in the Salzderhelden flood retention basin IUCN Category IV - Habitat / Species Management Area
	Attachment barrier in the NSG
location	Southeast of Einbeck , in the district of Northeim in Lower Saxony
surface	523 ha
Identifier	NSG BR 097
WDPA ID	165017
Geographical location	51 ° 47 ' N , 9 ° 55' E Coordinates: 51 ° 47 '17 " N , 9 ° 54' 57" E
Sea level	from 105 m to 111 m
Setup date	09/16/1995
administration	NLWKN

The polder I in the detention basin Salzderhelden is a nature reserve in the Lower Saxon city Einbeck and Northeim in Northeim district .

geography

The nature reserve with the registration number NSG BR 097 is around 523 hectares in size. It consists of two sub-areas that border directly on the " Leineniederung Salzderhelden " nature reserve between the two parts . The southern part of the nature reserve also borders on the " Water Bird Reserve Northeimer Seenplatte " nature reserve . The nature reserve is part of the EU bird sanctuary "Leinetal bei Salzderhelden". It is also a wildlife sanctuary and serves to protect endangered game birds . The hunt for partridges , mute swans , wild geese and wild ducks , coots and seagulls is prohibited in the nature reserve . The area has been a nature reserve since September 16, 1995. The responsible lower nature conservation authority is the district of Northeim.

The nature reserve is located in the Leiniederung between Northeim in the south and the Einbeck district of Salzderhelden in the north. It places part of Polder I as part of the Salzderhelden flood retention basin under protection and lies entirely within the walls of the flood retention basin . It is traversed by the Leine and flooded or dammed when the Leine floods and when the flood retention basin is blocked. The remaining part of Polder I is completely part of the “Leineniederung Salzderhelden” nature reserve.

The northern part of the nature reserve is characterized by extensive grassland areas with interspersed groups of trees, hedges and ditches , the Leine and a large still water . The grassland areas are partly used extensively and partly moderately intensively. Partial areas are occupied by wet meadows rich in sedge . The still water lies east of the Leine and has been artificially created as a secondary habitat. It is characterized by an alternation of shallow and deeper water areas. The bank areas are mainly occupied by reeds and bushes. The course of the river Leine is accompanied by bushes and gallery forests .

The southern part is also characterized by grassland areas and water areas on a bed load barrier in the Leine. In the area of the bed load dam, the course of the river was widened in order to reduce the flow velocity and to ensure the deposition of rubble and sediments from the Leine and the Rhume , which flows into the Leine a little above the nature reserve. This ensures that the dam in Salzderhelden is not blocked. At the same time, valuable shallow water habitats have been created along the Leine. The banks of the Leine are taken up by alluvial forest here . In the course of nature conservation measures carried out in 2011, additional gravel banks were created in the area of the bed load barrier as a retreat and breeding ground for birds .

fauna

The nature reserve is an important habitat for animal and plant species that are bound to damp and wet locations, including numerous species of birds , for which it also serves as a resting and wintering area. It provides a bird's brood area is of national importance. So here around 100 to breeding birds are detected, including white storks , cranes , quail , partridge , corncrake , Bläss- , pond and Spotted Crake , Water Rail , lapwing , snipe , various duck species, including Gadwall , Teal , black-tailed and shoveler , songbirds such as brown and bluethroat , sheep and gray wagtail , red-backed killer , meadow pipit , reed warbler , pond warbler and marsh warbler , field and reed oar and nightingale . Also Baillon's Crake and Warbler have already been proven. Wheatears used to breed along the wall , after large stones were removed from the dike in favor of a lawn, but the population died out.

Viewing platform at the bed load lock

During migration , the nature reserve is an important resting area for waterbirds and waders . Ducks, geese and Limikolen then appear in large numbers. So are u. a. Bar-tailed godwit , dwarf beach runners , Gray Plover , Sanderling , lapwing and golden plover , but also rare guests such as waders , red-necked phalarope , Marsh Sandpiper , Snipe , Sociable Lapwing , stilt walkers and mourning , Weißbart- and White-winged tern and black-necked grebe observed. Cranes and egrets also use the polder to rest.

During the winter months many geese rest in the area of the nature reserve, including Gray Goose , seeds and White-fronted Geese and barnacle , Canadian and pink-footed geese . Whooper swans continue to winter here . Various birds of prey also occur here or overwinter in the area, including Merlin , Montagu's Harrier , Buzzard and Hen Harrier .

In the southern part of the nature reserve are u. a. Gadgets , little grebes , little ringed plovers , wood sandpipers , kingfisher and bag tit can be found as breeding birds. Black stork and osprey use the area for foraging. During migration, numerous limikoles can be found in the shallow water areas of the bed load barrier, including snipes such as the double snipe , grass , marsh, sandpiper and sandpiper, plover , curlew and the Odin's grouse. Seagulls and various terns also use the area to rest. Due to the growing trees on the banks of the Leine, the area has lost its attractiveness for many birds, because the trees are used by birds of prey such as the hawk and sparrowhawk as a hideout for hunting flights.

At the edge of the nature reserve near Hollenstedt there is a viewing platform from which the bed load barrier is clearly visible.

Web links

Commons : Polder I in the Salzderhelden flood retention basin - collection of images, videos and audio files

Nature reserve "Polder I in the Salzderhelden flood retention basin" in the database of the Lower Saxony State Office for Water Management, Coastal and Nature Conservation (NLWKN)
Leinepolder Salzderhelden, sediment barrier Hollenstedt and Northeimer Kiesteiche , working group Göttingen ornithologists (AGO)

Individual evidence

↑ ^a ^b Nature reserve and wildlife reserve Polder I , Northeim district. Retrieved March 14, 2014.

↑ Salzderhelden flood retention basin , Leineverband. Retrieved March 14, 2014.

↑ We create living spaces! - Nature conservation measures at the Hollenstedt bed load barrier , August Oppermann Kiesgewinnungs- und Vertriebs-GmbH, October 25, 2010. Accessed on March 14, 2014.

↑ Gravel islands serve as a retreat and breeding ground for birds , Northeim district, April 10, 2012. Accessed March 14, 2014.

^ Protected view of the bird life in the Leinepolder , Hessische / Niedersächsische Allgemeine , July 27, 2012. Accessed on March 14, 2014.

[WSG-1] Nature reserve and wildlife reserve Polder I , Northeim district. Retrieved March 14, 2014.

[2] Salzderhelden flood retention basin , Leineverband. Retrieved March 14, 2014.

[3] We create living spaces! - Nature conservation measures at the Hollenstedt bed load barrier , August Oppermann Kiesgewinnungs- und Vertriebs-GmbH, October 25, 2010. Accessed on March 14, 2014.

[4] Gravel islands serve as a retreat and breeding ground for birds , Northeim district, April 10, 2012. Accessed March 14, 2014.